fix(caddyconfig): custom global Caddy config is preserved on regeneration,warn about last load error in 'uc caddy config' (fixes #412)

cmd/uc/caddy/config.go

@@ -8,6 +8,7 @@ import (
 	"github.com/alecthomas/chroma/v2/quick"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/completion"
+	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/spf13/cobra"
 )
 
@@ -66,5 +67,10 @@ func runConfig(ctx context.Context, uncli *cli.CLI, opts configOptions) error {
 		}
 	}
 
+	if config.LastReconciliationError != "" {
+		tui.PrintWarning(fmt.Sprintf("last Caddy config load failed: %s\nShowing the last saved Caddyfile.",
+			config.LastReconciliationError))
+	}
+
 	return nil
 }